Question

Excessive use of fertilisers can make the soil less fertile. So, to maintain fertility we can enrich the soil with nutrients by:

• A. Using manures
• B. Crop rotation
• C. Irrigation
• D. Leaving the land uncultivated

Answer 1

Answer: (A), (B), (D)

Leaving the land uncultivated

The use of fertilisers has helped farmers to get better yields of crops. But excessive use of fertilisers can make the soil less fertile. Therefore, in order to maintain the fertility of the soil, fertilisers should be substituted by either:

• Organic manures
• By leaving the field uncultivated (fallow) in between two crops
• By crop rotation (growing different crops alternately)

Irrigation, on the other hand, is the supply of water to crops at regular intervals. It does not replenish the soil with nutrients.